A father has appeared in court for the first time after being accused of covering up his son's alleged involvement in a high-speed crash that killed two Sydney siblings.
Johnson Kokozian, 20, remains on remand on charges stemming from the horror smash in Heckenberg on September 1.
The SUV he was allegedly driving smashed head-on into a car containing siblings Alina Kauffman, 24, and Ernesto Salazar, 15, killing them both.
Police allege Kokozian fled the scene after crashing the Mercedes-Benz AMG while travelling at nearly double the speed limit for the 50km/h zone.
His father Kagadour Hanna Kokozian was charged with concealing an indictable offence and hindering a police operation ahead of his appearance at Liverpool Local Court on Thursday.
Police allege the father and son, together with Johnson's 22-year-old girlfriend Tiana Savignano, discussed a cover story and made false reports to investigators following the crash.
Savignano has also been charged with concealing a serious indictable offence and hindering the police investigation.
Kokozian's friend Cruz Pamoana Davis-Tuka and another woman, Laila Moukhallaletti, have also been charged with helping to conceal the crime.
Earlier this month, Savignano pleaded guilty to filming her boyfriend during a Parramatta Local Court bail hearing on September 3 as he faced one charge of aggravated dangerous driving occasioning death.
She will be sentenced over the illegal filming incident on November 27.
Johnson and Kagadour Kokozian, along with Savignano, Davis-Tuka and Moukhallaletti, will all come before Campbelltown Local Court on November 1 for a mention over charges relating to the Heckenberg crash.
